Config file:

You can put default options into the config file ~/.jack_oscrolloscoperc.
This file should consist of one single line, with the options just like you would have entered
them on the command line.

Options given on the command line override those in the config file. To override options
which take no arguments, append 0. E.g. to override "-s", use
"-s0".

Port arguments are not yet supported in the config file.

Troubleshooting

jack_oscrolloscope eats too much CPU:

Unfortunately, with SDL (option -G), scrolling currently can't be hardware accelerated on X11.
If this is an issue, use OpenGL, disable scrolling (-s), or reduce the window size / number
of tracks.

Too much jitter...:

If scrolling is not as smooth as it ought to be, you should...

Enable vsync (highly recommended). How to do this depends on your hardware/driver.
If you're using the Nvidia driver, jack_oscrolloscope will automatically enable vsync by setting
the environment variable __GL_SYNC_TO_VBLANK=1.
ATI users may find this helpful.

Once vsync is working, use the "-f 0" swich to make sure that jack_oscrolloscope
runs at the same frequency as your monitor.

You may want to put "-f 0" into your ~/.jack_oscrolloscoperc.
Do not use -f 0 unless vsync is actually working, as that would only cause a useless
waste of CPU cycles.